Error sensing apparatus for a document handler





1. IN COMBINATION: APPARATUS FOR AUTOMATICALLY READING AN INFORMATIONBEARING DOCUMENT AND FOR PROVIDING ELECTRICAL REPRESENTATIONS OF THEINFORMATION THEREON, A DATA PROCESSING UNIT FOR PERFORMING A PLURALITYOF OPERATIONS ON INFORMATION SUPPLIED THERETO, MEANS FOR TRANSFERRINGSAID ELECTRICAL REPRESENTATIONS TO SAID DATA PROCESSING UNIT, A DEVICECONTAINING A PLURALITY OF RECEPTACLES FOR RECEIVING DOCUMENTS, AREGISTER FOR STORING A RECEPTACLE INDENTIFICATION ITEM IDENTIFYING ONEOF SAID RECEPTACLES, MEANS FOR RECEIVING SAID DOCUMENT AND FORDEPOSITING SAID DOCUMENT IN ONE OF SAID RECEPTACLES IN RESPONSE TO ANIDENTIFICATION ITEM IN SAID REGISTER IDENTIFYING SAID ONE RECEPTACLE,MEANS FOR CAUSING SAID DATA PROCESSING UNIT TO PRODUCE A RECEPTACLEIDENTIFICATION ITEM IN RESPONSE TO SAID ELECTRICAL REPRESENTATIONS,MEANS FOR TRANSMITTING THE IDENTIFICATION ITEM PRODUCED BY SAID DATAPROCESSING UNIT TO SAID REGISTER, MEANS FOR PROVIDING A FIRST SIGNALFOLLOWING THE TERMINATION OF AN INTERVAL OF PREDETERMINED DURATIONREALTIVE TO THE TIME OF READING SAID DOCUMENT, TESTING MEANS FOR SENSINGTHE TRANSMISSION OF SAID IDENTIFICATION ITEM TO SAID REGISTER, AND MEANSRESPONSIVE TO SAID FIRST SIGNAL AND THE FAILURE OF SAID TESTING MEANS TODETECT SAID TRANSMISSION PRIOR TO THE OCCURRENCE OF SAID FIRST SIGNALFOR GENERATING A SECOND SIGNAL.